.pg-tab{
    width: 500px;
    height: 500px;
    border: 1px solid black;
    transition: opacity 0.1;
    .pg-nav{
        height: 50px;
        border-bottom: 1px solid black;
        .nav-item{
            float: left;
            line-height: 50px;
            text-align: center;
            &.current{
                background-color: black;
                color: white ;
            }
        }
    }
    .pg-page{
        position: relative;
        width: 100%;
        height: 450px;
        .page-item{
            display: none;
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100% ;
            text-align: center;
            line-height: 450px;
            &.current{
                display: block;
            }
        }
    }
}